Question
Riordan's colour printer takes 13 minute to print one large photograph. Riordan set the colour printer to print 30 such large photographs continuously. What is the latest time Riordan must start printing so that the photographs are printed by 10.20 p.m?
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Riordan's colour printer takes 13 minute to print one large photograph. Riordan set the colour printer to print 30 such large photographs continuously. What is the latest time Riordan must start printing so that the photographs are printed by 10.20 p.m?